2021 Genesis G80 Engine Problems
- Complaints
- 1about this part
- Share
- 11%of 9 total for the year
- Median mileage
- 29,034miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine of the 2021 Genesis G80, 11% of the 9 complaints for this model year. Where a mileage was given, the median is 29,034 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owns a 2021 Genesis G80. The contact stated while driving 30-40 mph on two separate occasions, the transmission disengaged, and the vehicle stalled and restarted without warning. The local dealer was not contacted. The vehicle was not diagnosed nor repaired. The manufacturer was notified of the failure. The failure mileage was 29,034.”
NHTSA complaint #11425645, filed 2021-07, 29,034 milesRelated service bulletins
- 11033845Jun 10, 2026Some Genesis vehicles (listed below) equipped with Lambda-III 3.5T-GDI engines may exhibit reduced heater performance due to engine coolant deposits clogging the heater core…
- 11031401Apr 18, 2026Some vehicles may exhibit difficulty starting in cold weather. This bulletin provides the procedure to perform an inspection on the starter magnetic switch for potential freezing…
- 11025550Nov 13, 2025This notice is being sent to you as our records indicate you may have previously received an important Service Campaign notice for Genesis Campaign Number 914G.
- 11023246Sep 20, 2025Genesis has become aware that some vehicles may illuminate the Check Engine Light indicator as a result of detected engine misfires.
- 11021791Aug 6, 2025Certain G80 (RG3), GV70 (JK1/JK1A), and GV80 (JX1) vehicles equipped with Theta III 2.5L T-GDI engines may illuminate the Check Engine Light as a result of misfire DTCs P0300…
- 11021790Aug 6, 2025Certain G80 (RG3), GV70 (JK1/JK1A), and GV80 (JX1) vehicles equipped with Theta III 2.5L T-GDI engine may illuminate the Check Engine Light as a result of misfire DTCs P0300…
Engine: other model years
Other parts of the 2021 Genesis G80
3 complaintsTires
3 complaintsElectrical system
2 complaintsOther or unknown
1 complaintsBody and structure
1 complaintsTransmission and drivetrain
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2021 Genesis G80
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology